package collection;

import java.util.ArrayList;
import java.util.Collection;

/**
 * 集合间的操作
 */
public class CollectionOperDemo {
    public static void main(String[] args) {
        Collection c1=new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("ci:"+c1);

        Collection c2=new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println(c2);


        c1.addAll(c2);//将C2添加到才中
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3=new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);

        boolean contains=c1.containsAll(c3);//判断c1中是否包含c3值的所有元素
        System.out.println("是否包含:"+contains);


        //取交集：c1中仅保留与c3所共有的元素，而c3不变
        /*c1.retainAll(c3);
        System.out.println("c1:"+c1);//c++,android
        System.out.println("c3:"+c3);//c++,android,php

         */

        //删交集：将c1中鱼c3共有的元素删除，c3不变
        c1.removeAll(c3);
        System.out.println("c1:"+c1);//c1:java,.new,ios,java
        System.out.println("c3:"+c3);//c++,android,php


    }
}
